The docs promise the in "x BETWEEN y AND z" the x expression is only evaluated

once.  That is no longer true, and so some tests are failing.  This needs to
be fixed before merging to trunk.

FossilOrigin-Name: e50d264fdc2f08d19202c68f73f18df301cb233d

manifest

@@ -1,5 +1,5 @@
-C Further\scomment\senhancements.\s\sNo\schanges\sto\scode.
+C The\sdocs\spromise\sthe\sin\s"x\sBETWEEN\sy\sAND\sz"\sthe\sx\sexpression\sis\sonly\sevaluated\nonce.\s\sThat\sis\sno\slonger\strue,\sand\sso\ssome\stests\sare\sfailing.\s\sThis\sneeds\sto\nbe\sfixed\sbefore\smerging\sto\strunk.
-D 2016-08-20T21:11:25.815
+D 2016-08-20T22:49:28.330
 F Makefile.in cfd8fb987cd7a6af046daa87daa146d5aad0e088
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc d66d0395c38571aab3804f8db0fa20707ae4609a
@@ -338,7 +338,7 @@ F src/ctime.c e77f3dc297b4b65c96da78b4ae4272fdfae863d7
 F src/date.c 95c9a8d00767e7221a8e9a31f4e913fc8029bf6b
 F src/dbstat.c 19ee7a4e89979d4df8e44cfac7a8f905ec89b77d
 F src/delete.c 76c084f0265f4a3cd1ecf17eee112a94f1ccbc05
-F src/expr.c b6f0592292944a1700b503d00f588932f5683d67
+F src/expr.c 157f2aa7e573c8d354ccfea9955dac2842467b0e
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c e2be0968c1adc679c87e467aa5b4f167588f38a8
 F src/func.c 29cc9acb170ec1387b9f63eb52cd85f8de96c771
@@ -1519,7 +1519,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 4fb66d6592b141a4a71359250dbd1ac454569cb9
+P d4562a9e7b1eaff41466210e3a0caaf374ec5a92
-R 560b79caaccb19afcc4a2c629096a4bc
+R 79bb83cf9bac81ae1bf4f01bc53e554b
 U drh
-Z f5ddde0143384b43283a729a6b1d1670
+Z 762069ce8b935adb1e168884e493813e

manifest.uuid

@@ -1 +1 @@
-d4562a9e7b1eaff41466210e3a0caaf374ec5a92
+e50d264fdc2f08d19202c68f73f18df301cb233d

src/expr.c

@@ -4064,55 +4064,54 @@ int sqlite3ExprCodeExprList(
 **
 ** Code it as such, taking care to do the common subexpression
 ** elimination of x.
+**
+** The xJumpIf parameter determines details:
+**
+**    NULL:                   Store the boolean result in reg[dest]
+**    sqlite3ExprIfTrue:      Jump to dest if true
+**    sqlite3ExprIfFalse:     Jump to dest if false
+**
+** The jumpIfNull parameter is ignored if xJumpIf is NULL.
 */
 static void exprCodeBetween(
   Parse *pParse,    /* Parsing and code generating context */
   Expr *pExpr,      /* The BETWEEN expression */
-  int dest,         /* Jump here if the jump is taken */
+  int dest,         /* Jump destination or storage location */
-  void (*xJumpIf)(Parse*,Expr*,int,int),
+  void (*xJump)(Parse*,Expr*,int,int), /* Action to take */
   int jumpIfNull    /* Take the jump if the BETWEEN is NULL */
 ){
   Expr exprAnd;     /* The AND operator in  x>=y AND x<=z  */
   Expr compLeft;    /* The  x>=y  term */
   Expr compRight;   /* The  x<=z  term */
-  Expr exprX;       /* The  x  subexpression */
+
-  int regFree1 = 0; /* Temporary use register */
+  assert( xJump==0 || xJump==sqlite3ExprIfTrue || xJump==sqlite3ExprIfFalse );
+  assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
 
   memset(&compLeft, 0, sizeof(Expr));
   memset(&compRight, 0, sizeof(Expr));
   memset(&exprAnd, 0, sizeof(Expr));
-
-  assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
-  exprX = *pExpr->pLeft;
   exprAnd.op = TK_AND;
   exprAnd.pLeft = &compLeft;
   exprAnd.pRight = &compRight;
   compLeft.op = TK_GE;
-  compLeft.pLeft = &exprX;
+  compLeft.pLeft = pExpr->pLeft;
   compLeft.pRight = pExpr->x.pList->a[0].pExpr;
   compRight.op = TK_LE;
-  compRight.pLeft = &exprX;
+  compRight.pLeft = pExpr->pLeft;
   compRight.pRight = pExpr->x.pList->a[1].pExpr;
-  if( sqlite3ExprIsVector(&exprX)==0 ){
+  if( xJump ){
-    exprToRegister(&exprX, sqlite3ExprCodeTemp(pParse, &exprX, &regFree1));
+    xJump(pParse, &exprAnd, dest, jumpIfNull);
-  }
-  if( xJumpIf ){
-    xJumpIf(pParse, &exprAnd, dest, jumpIfNull);
   }else{
-    exprX.flags |= EP_FromJoin;
+    /*exprX.flags |= EP_FromJoin;*/
     sqlite3ExprCodeTarget(pParse, &exprAnd, dest);
   }
-  sqlite3ReleaseTempReg(pParse, regFree1);
 
   /* Ensure adequate test coverage */
-  testcase( jumpIfTrue==0 && jumpIfNull==0 && regFree1==0 );
+  testcase( xJump==sqlite3ExprIfTrue  && jumpIfNull==0 );
-  testcase( jumpIfTrue==0 && jumpIfNull==0 && regFree1!=0 );
+  testcase( xJump==sqlite3ExprIfTrue  && jumpIfNull!=0 );
-  testcase( jumpIfTrue==0 && jumpIfNull!=0 && regFree1==0 );
+  testcase( xJump==sqlite3ExprIfFalse && jumpIfNull==0 );
-  testcase( jumpIfTrue==0 && jumpIfNull!=0 && regFree1!=0 );
+  testcase( xJump==sqlite3ExprIfFalse && jumpIfNull!=0 );
-  testcase( jumpIfTrue!=0 && jumpIfNull==0 && regFree1==0 );
+  testcase( xJump==0 );
-  testcase( jumpIfTrue!=0 && jumpIfNull==0 && regFree1!=0 );
-  testcase( jumpIfTrue!=0 && jumpIfNull!=0 && regFree1==0 );
-  testcase( jumpIfTrue!=0 && jumpIfNull!=0 && regFree1!=0 );
 }
 
 /*